{"answers":{"affected":"3 open source packages ship an affected version, including github.com/justinas/nosurf. It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-36564 in the wild and no public exploit code.","fix":"Upgrade github.com/justinas/nosurf to 1.1.1 or later.","what":"CVE-2020-36564 is a high-severity vulnerability in github.com/justinas/nosurf, published on 27 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-36564 and fix it if it is affected.\n\nWhat it is: CVE-2020-36564 is a high-severity vulnerability in github.com/justinas/nosurf, published on 27 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2020-36564 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/justinas/nosurf (Go): affected all versions; fixed in 1.1.1\n- github.com/justinas/nosurf (Go): affected all versions; fixed in 1.1.1\n- github.com/justinas/nosurf (Go): affected all versions; fixed in 1.1.1\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2020-36564/ (Markdown: https://insights.sbomify.com/CVE-2020-36564/index.md)","id":"CVE-2020-36564","markdown":"https://insights.sbomify.com/CVE-2020-36564/index.md","name":"CVE-2020-36564","record":{"aliases":["GHSA-5x84-q523-vvwr","GO-2020-0049"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Go CSRF library","requires_auth":"none","summary":"Attackers can bypass CSRF protection by providing a malformed token, allowing unauthorized state-changing requests.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Go","cpe":[{"product":"nosurf","vendor":"nosurf_project"}],"cvss":{"score":7.5,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"description":"Due to improper validation of caller input, validation is silently disabled if the provided expected token is malformed, causing any user supplied token to be considered valid.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Improper input validation in github.com/justinas/nosurf","id":"CVE-2020-36564","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"security_feature_bypass","year":"2020"},"n_packages":3,"n_references":3,"next":{"headline":"Directory traversal on Windows in github.com/labstack/echo/v4","id":"CVE-2020-36565"},"packages":[{"ecosystem":"Go","fixed":["1.1.1"],"introduced":["0"],"last_affected":[],"package":"github.com/justinas/nosurf","purl":null,"source":"GHSA-5x84-q523-vvwr"},{"ecosystem":"Go","fixed":["1.1.1"],"introduced":["0"],"last_affected":[],"package":"github.com/justinas/nosurf","purl":"pkg:golang/github.com/justinas/nosurf","source":"GHSA-5x84-q523-vvwr"},{"ecosystem":"Go","fixed":["1.1.1"],"introduced":["0"],"last_affected":[],"package":"github.com/justinas/nosurf","purl":"pkg:golang/github.com/justinas/nosurf","source":"GO-2020-0049"}],"prev":{"headline":"Weak hash (SHA-1) in github.com/RobotsAndPencils/go-saml","id":"CVE-2020-36563"},"products":["github.com/justinas/nosurf"],"published":"2022-12-27","related":[{"cvss_score":6,"headline":"nosurf vulnerable to CSRF due to non-functional same-origin request checks","id":"CVE-2025-46721","kev_date_added":null,"published":"2025-05-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-04-11","vendors":["github.com/justinas/nosurf"]},"summary":"Attackers can bypass CSRF protection by providing a malformed token, allowing unauthorized state-changing requests.","url":"https://insights.sbomify.com/CVE-2020-36564/"}